A time will however come (as I believe) when physiology will invade and destroy mathematical physics, as the latter has destroyed geometry.

So many new ideas are at first strange and horrible though ultimately valuable that a very heavy responsibility rests upon those who would prevent their dissemination.

A time will however come (as I believe) when physiology will invade and destroy mathematical physics, as the latter has destroyed geometry.

Until politics are a branch of science, we shall do well to regard political and social reforms as experiments rather than short-cuts to the millennium.

Reality is the cage of those who lack imagination.

I have never yet met a healthy person who worried very much about his health, or a really good person who worried much about his own soul.

The future will be no primrose path. It will have its own problems. Some will be the secular problems of the past, giant flowers of evil blossoming at last to their own destruction. Others will be wholly new.